preview upcoming programs, and watch college lectures, museum torres, archival films, and more. american history tv at c-span.org/history. announcer: this weekend on american artifacts, we tore carpenters hall in philadelphia, constructed in 1770 by members of the oldest trade guild in america. here is a preview. when the constitution was finally adopted, philadelphia decided to have a grand federal procession to celebrate. formbuilt a float in the of a domed building. it was designed by a member of the carpenters company. by nine was supported columns and three that were not

quite holding up their end. when the organizers of the grand federal procession decided who would lead the procession, it was the float of the grand federal edifice. each of the columns named fred a state, including -- each of the columns named for a state, including the three that had not yet ratified. all of the carpenters, the master builders, march 1 in the parade -- marched first in the parade. that was the banner they carried. it is another one of those things which the modern members of the company are so proud of because they not only fought hard for the revolution, but they became major supporters of the federal constitution.

again, the company had a national role that is little known until you come to carpenters hall and a sea of yourself -- and see it for yourself. watch the entire tour of carpenters hall in philadelphia at 6:00 p.m. and 10:00 p.m. eastern sunday on american artifacts. this is american history tv only on c-span3. you are documentary has been selected as this year's grand prize winner. seventh and ninth grade sisters of blacksburg, virginia, this year's grand prize winners of our studentcam documentary competition. their winning documentary

explores refugees and immigration policy. >> a refugee is defined as someone who has been forced to flee his or her country because of persecution, war, or violence. with so many people fleeing their countries, desperate, politicians and institutes today arguing over one urgent question -- should united states let more refugees into the country? announcer: they win the $5,000 prize. this year, we asked middle and high school students were documentaries telling us, what is the most urgent issue for the new president and congress in 2017? students competed for the chance to win one of 150 prizes totaling $100,000. we received a most thousand entries from 46 states, plus the columbia, india, germany, singapore, and taiwan. we are happy to announce our first place winners. in the middle school category, eighth-graders molly doherty,

camden lewis, and ava decker from west scranton intermediate school in scranton, pennsylvania for their documentary u.s. gun violence: a comp located puzzle. the first place winner in the high school used category is from gonzales high school in washington, d.c. for his documentary entitled invisible, which deals with homelessness. matthew also won this year's fan favorite contest. in the high school central category, our winner is 12th-graders jared clark from royal oaks high school in michigan for his piece enough is enough, dealing with pharmaceutical pricing. and our studentcam first prize winner for the high school west category is a ninth grader from laramie high school in laramie, wyoming for herpes fossil fuels -- for her piece, fossil fuels to renewable. congratulations to all the

students and their teachers for competing and making this year's competition a success. the top 21 winning entries will air on c-span in april and you can watch all 150 documentaries >> on lectures in history, texas christian university professor max brockwell teaches a class on changes to labor organizing in the post-world war ii era. he describes how unions argued for the continuation of wartime practices, but often failed due to opposition from manufacturers and the lack of political party supports. his class is about an hour. i will try to get to those points. these readings cover a lot of different topics of this. do today ising to pulled together separate